CDCP Cooling and Environmental Control 2

Question 1

What is the recommended temperature range for a data center's hot aisle according to ASHRAE A1 guidelines?

Accepted Answer

64.4°F–80.6°F (18°C–27°C)

Answer

ASHRAE A1 guidelines specify an allowable supply air temperature range of 64.4°F to 80.6°F (18°C to 27°C) for data center equipment.

Question 2

What does the term 'containment' refer to in data center cooling design?

Accepted Answer

Separating hot exhaust air from cold supply air to improve cooling efficiency

Answer

Containment in data centers refers to the physical separation of hot exhaust air and cold supply air, typically using hot-aisle or cold-aisle containment systems, to improve cooling efficiency.

Question 3

Which cooling metric measures the ratio of heat removed by a cooling unit to the electrical energy consumed by that unit?

Accepted Answer

Coefficient of Performance (COP)

Answer

Coefficient of Performance (COP) is the ratio of useful cooling provided to the energy consumed by the cooling equipment, indicating how efficiently a cooling system operates.

Question 4

In a raised-floor data center, perforated tiles are placed in the cold aisle. What is the primary purpose of these tiles?

Accepted Answer

To allow conditioned air from the under-floor plenum to flow up into server intakes

Answer

Perforated tiles allow cool air supplied through the raised-floor plenum to rise into the cold aisle where servers can draw it through their front intakes.

Question 5

What is 'free cooling' in the context of data center thermal management?

Accepted Answer

Using outside ambient air or water to supplement or replace mechanical refrigeration when conditions allow

Answer

Free cooling uses favorable ambient conditions (cool outside air or water) to provide cooling with minimal mechanical refrigeration, significantly reducing energy consumption.

CDCP - Certified Data Centre Professional Practice Test

CDCP - Certified Data Centre Professional Practice Test

CDCP Cooling and Environmental Control 2